Acanthophyllia dwindling- lanthanum a cause?

[FGourdin]

I have had a beautiful Meat Coral for about 14 months. For the first year it inflated to about 10" in diameter during the day. For the last 2 months it is only opening 4-5" and is rejecting food. Skeleton not exposed so far. Other soft, LPS and SPS corals doing well. Parameters good (Alk8.9, CA 425, Mg1320 , PO4 .06- .15, Nitrate .80- 3.0, molybdenum and selenium mildly elevated on Icp) ICP lanthunum= 3.7ug/L with normal being < 3.0 I am using it in the form of Phos- E to control phosphate. I know elevated lanthanum has been implicated in clam regression and wondered if it could be effecting my Acan. Anything else to look for?

 

[Reefing Madness]